US 2015/0090796 A1 · METHOD AND SYSTEM FOR DETECTING A CORRECTION PATTERN IN A QR CODE

Abstract

Method and system for detecting a correction pattern in a QR code are disclosed. In the detection of a correction pattern, coordinates of the correction pattern is at first roughly estimated according to the detected coordinates of the detection patterns and different QR code versions, then a square region is specified around the coordinates of the correction pattern, in which a search is performed repeatedly. Finally, in conjunction with the characteristic of the correction pattern itself, i.e., having a line segment meeting a predetermined ratio, the correction pattern may be accurately located in the predetermined area, without the need of searching patterns meeting a 1:1:1 ratio line by line in the entire QR code image.

Claims29

Dependent claims

A method for detecting a correction pattern in a QR code, the method comprising:

obtaining reference coordinates based on the relative location relationship between a central point of the correction pattern and central points of detection patterns;
locating the correction pattern precisely in a predetermined area with respect to the reference coordinates to obtain coordinates of the central point of the correction pattern.

Dependencies are inferred from the claim text.

Method and system for detecting a correction pattern in a qr code

Life of this patent

Method and system for detecting a correction pattern in a qr code

Life of this patent

Abstract

Claims29